PERMFILE54992

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: OLD
• Section_Exhibit Name: EXHIBIT 25p Pavement Evaluation & Recommendation, Fish Creek Borehole Access Road
• Media Type: D
• Archive: No

Structutal Number Verification
(AASHTO Design of Pavement Structure - L986)
HAUL ROADS
Traffic: Design 18 kip ESAL: 120,000
Reliability: 50 percent
Overall Deviation: 0.40
Soils: Resilient Modulus 5000 psi
PSI Loss Due To Traffic: 2.0
Required Strucmral Number = 2.26
ACCESS ROADS
• Traffic: Design 18 kip ESAL: 6,500
Reliability: 50 percent
Overall Deviation: 0.40
Soils: Resilient Modulus 5000 psi
PSI Loss Due To Traffic: 2.0
Required Structural Number = 1.36
Required Gravel Sections
Haul Road B Ex[ension
Minimum Structural Number(MSN) required = 2.26
Average Existing Road Base Section = 7.5" (fair condition)
Existing Subbase Gravel Section = l2" (fair condition)
Existing Structural Number (ESN) = 7.5 (0.10) + 12(0.08) = 1.71
Required Structural Number = MSN -ESN = 2.26 - 1.71 = 0.55
• Gravel Section Required => 0.55/0.14 = 3.9 =>
Use 4 inches of Class V I Base Course.